Remove duplicate functionality

- remove customer hosting package list
- replace useless dashboard with redirect
- move all hosting package list for superuser to top level menu item
- replace btn-default with btn-secondary
- improve email address management page

gnuviechadmin/templates/account/email_confirm.html

@@ -11,7 +11,7 @@
         {% endblocktranslate %}</p>
         <form method="post" action="{% url 'account_confirm_email' confirmation.key %}">
             {% csrf_token %}
-            <button type="submit" class="btn btn-default">{% translate 'Confirm' %}</button>
+            <button type="submit" class="btn btn-primary">{% translate 'Confirm' %}</button>
         </form>
     {% else %}
         {% url 'account_email' as email_url %}